A company that owns several newspapers in Michigan has filed for Chapter 11 bankruptcy.

Journal Register Co. owns four daily newspapers in Michigan: The Oakland Press, The Macomb Daily, Morning Sun of Mount Pleasant and Daily Tribune of Royal Oak.

It also owns dozens of weekly publications throughout the state under the names Heritage Newspapers, Advisor and Source Newspapers, Morning Star Publishing Co. and Voice Newspapers.

Yardley, Penn.-based Journal Register, which includes media products that serve 10 states, is owned by Digital First Media, a New York-based firm that also includes MediaNews Group, owner of The Detroit News.

The Journal Register also went through bankruptcy in 2009.

“The Company exited the 2009 restructuring with approximately $225 million in debt and with a legacy cost structure, which includes leases, defined benefit pensions and other liabilities that are now unsustainable and threaten the Company’s efforts for a successful digital transformation,” Digital First CEO John Paton wrote in his blog.

The company has signed an initial bid from 21st CMH Acquisition Co., an affiliate of funds managed by Alden Global Capital LLC. Alden has invested in other media companies including Tribune Co., MediaNews Group and Philadelphia Media Network, according to nonprofit journalism organization Poynter.

The auction and sale should be complete within 90 days, according to a release. Paton said the filing will not impact day-to-day operations.

“And while I get this news may make some of you nervous, don’t let it,” he wrote. “Concentrate on the job at hand and we will work through this. This really is the right decision for Journal Register Company.”